Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using sat snippets" » "python using data snippets", "python using a snippets", "python using raw snippets"
"phap hoc sach snippets" » "phap hoan sach snippets", "phap mo sach snippets", "phap han sach snippets", "phap hoc sinh snippets", "phap hoc cac snippets", "phap hoc anh snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("phap hoc sach snippets") OR ("python using sat snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"phap hoc sach snippets\") OR (\"python using sat snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( phap hoc sach snippets ) OR ( python using sat snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap hoc sach snippets") OR ("python using sat snippets"))) OR ("locating bug core snippets"))*.